In Tabx, a Brand is a preconfigured set or colours and images that can be applied to a Project to customise that Project to your clients branding. A Brand can also be used to set the default colour series for charts so that those colours don't have to be defined on a chart-by-chart basis.
To add a Brand to Tabx, you must be logged in as either the License Administrator, or as a License Editor.
To edit a Brand that exists in your License:
Read the Changing the Project Options section in Basic Project Management